thrall
noun /θrɔːl/
  /θrɔːl/
Word OriginOld English thrǣl ‘slave’, from Old Norse thræll.
Idioms Idioms 
in (somebody’s/something’s) thrall | in thrall to somebody/something 
- (literary) controlled or strongly influenced by somebody/something- His gaze held her in thrall.
- She was in thrall to her emotions.